//! Bit-sliced `GF(2)`, in three layers:
//!
//! ```text
//! underlier a block of bits, 8 to 512 wide, with no field structure
//! packing that block read as one GF(2) element per bit
//! transpose a square matrix of packings, turned on its diagonal
//! ```
//!
//! An element carries one bit, so holding it in a byte wastes seven eighths of a register.
//! The packing fixes the lane order, and everything else here follows it.
pub use ;
pub use ;